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LAST BUT NOT LEAST : DRILLING METHODS
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DRILLING METHODS
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DRILLING METHODS
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5
TOPHAMMER THE WORLD LEADING DRILLING METHOD FOR SURFACE AND UNDERGROUND
DRILLING When?
Hole sizes 23-205 mm
Hole depths up to 30 m
Demand for high mobility
Short set-up time required
Advantages
Atlas Copco Total Rock Drilling Technology
Advanced manufacturing technology
High productivity
Wide range of drilling solutions
World wide market support
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APPLICATION AREAS
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Drifting tunneling
Mines
Tunnels
Surface
Mines (Open pit)
Quarry
Dimensional stone industry (sheets of marble, grave stones)
Dimension
Stone
industire
Production underground
Bolting
Construction
Roads/Railroads
Tunnelling
Foundation (housing, bridges)
Ground engineering
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SELECTION DRIFTING AND TUNNELLING
Customer demands
Small holes
High productivity
Drill meter- or supply contract
Equipment
Drifter bits 41-57 mm
Drifter rods L = 3.1 6.4 m
Couplings
Shank adapters
Reaming 64-127 mm
Grinding GM BQ2/BQ3
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8
The tunnel cycle
Charging
Blasting
Bolting
Scaling
Loading
Shotcrete
Drilling
Ventilation
DRIFTING AND TUNNELLING
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DRILL STRING FOR DRIFTING AND TUNNELLING
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The drill bit's task is to effectively penetrate the geological formation
The bit should be chosen with these parameters in mind :
Rock
Rock drill
Penetration rate
Service life
Grinding interval
Hole quality
Drill bits
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Penetration Index in Granite with approximately 200 MPa (30 000 psi)
Cross bit 100
Spherical button bit 115
Ballistic button bit 130
150 Full-ballistic button bit
DRILL BITS
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Models for Drifting & Tunneling
-34-67 -37 -27 -56 -37-67 -39
Button bits
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1xx-5xxx-37-66,39-20
1xx-5xxx-37-67,39-20
1xx-5xxx-37,39-20/1xx-5xxx-37-30-67,39-20
1xx-5xxx-34-67,39-20
1xx-5xxx-34,39-20
1xx-5xxx-27-67,39-20
1xx-5xxx-27,39-20
1xx-5xxx-56,39-20
1xx-5xxx-39,39-20
102-7xxx-44,20-17
SOFT ROCK MEDIUM HARD ROCK
2 200 bar (32 000 psi)
HARD ROCK
SELECTION CHART
DRIFTING AND TUNNELING DRILLING BITS
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Dome bit
-42-24-67
Conventional
REAMING EQUIPMENT
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Drifter rods
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DRIFTER RODS
The ideal drifter rod should have four
basic properties:
Stiffness, to minimize energy losses and optimize hole straightness.
Toughness, to prevent the steel breaking when subjected to high bending stress,
e.g. as a result of heavy hole deviation.
Fatigue strength, to withstand variations in compressive and tensile loads.
Resistance to wear, to ensure that the threads have long service life.
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In the carburization process, carbon is imparted to the surface of the rod at high temperature.
After that the rod is cooled by quenching.
This gives the rod a very hard surface layer and high wear resistance.
CARBURIZATION
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SHOT PEENING
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COUPLINGS
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COUPLINGS
Full bridge stop
Cross over
Central stop
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Secoroc produce more than 350 different types of shank adapters for virtually all types of rock drills
Wear resistance, fatigue strength and resilience to stand up to bending stresses are key criteria for the selection of
material and manufacturing methods
High quality steel
State-of-the-art heat treatment
Manufactured to close tolerances
Rigorous quality control
SHANK ADAPTERS FEATURES
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Production Drilling
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SELECTION - PRODUCTION DRILLING
Customer demands
Long holes 12 30 m
Straight holes
Drill meter- or Supply contract
Equipment
Bits 64 -115 mm
Speedrods/tubes L = 1.2 1.8 m
Couplings
Shank adapters
Grinding GM BQ2/BQ3
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MF rod / MF rod, Standard bit
MF rod / Guide tube, Retrac bit
TDS string, Guide bit
RECOMMENDED SELECTIONS
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Flat face XHD Model -21
Flat face standard
Flat face HD Model -20
Drop center standard
BUTTON BITS
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BUTTON BITS - RETRAC
Drop centre standard
Flat face standard
Drop centre XHD Model -21
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EXTENSION DRILLING
Male male
Speed rods
TDS-tubes
Production drilling
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DRILL RODS / DRILL TUBES - FEATURES
Wear resistance, fatigue strength and resilience to
stand up to bending
stresses are key criteria
High quality steel
Fully carburized: Good wear resistance and high
fatigue strength.
Manufactured to close tolerances
Rigorous quality control
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SELECTION - BOLTING
Customer demands
Short holes-bolts 1.5 3.2 m
Long holes-Cable 10 40 m
Small diameter holes
Precise bit diameters
Equipment
Bits
32 -45 mm
Speedrods or Integrals/Taper L = 0.7 3.2 m
Shank adapters
Grinding
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Models for Bolting
-34-67 -37 -27 -56 -37-67 -39
Button bits
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R-thread T-thread
Wear volume
COMMON THREADS
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THE STANDARD R32 SYSTEM
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THE MAGNUM SR DIFFERENCE
For blast hole sizes 45 mm (1 3/4) and up
Enough with material at the bit skirt
32 mm (1 1/4) thread
Conical rope thread (patent pending)
35 mm (1 3/8) thread
Hexagonal 35 mm (1 3/8) rod
25% more material means a substantial increase in metal fatigue resistance
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ADVANTAGE WITH MAGNUM SR COMPARED
TO THE STANDARD SYSTEM
This drifting system is adapted to the new generation of powerful hydraulic rock drills.
Considerably better rod life due to the ingenious design of the system.
Better service life of the entire drill string, better availability and less wear on the rock drill and the drill rig components due to easy uncoupling and
fewer tensile shock waves in the string.
Easier collaring and straighter holes due to a stiffer drill string (H35 vs. H32).
Increased service life on the rods with 25-70% compared to standard R32 drifter rods.
Very high operator acceptance due to easy uncoupling of the drill bits.
Flushing capacity (round 39 mm 14,5 mm vs. hex 32 mm 9,5 mm).
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SR38 Injection drilling, cable bolting SR35 Drifting SR32 Bolting Drifting SR28 Bolting SR25 Small diameter holes SR22 Hand held bolting SA
THE MAGNUM SR FAMILY
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SECOROC TC35 IN UNDERGROUND
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SECOROC TC35
Based on the same technology as the Secoroc Magnum SR but with a conical
trapezoidal thread .The TC35 system is used For cable bolting and production
drilling with hole diameters from 48-64 mm.
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Secoroc TC42 The ideal tunneling and drifter solution
This 57-64 mm diameter system is at home in tunnels. Thanks to the selection of
extension drill rods, TC42 has become a popular choice among grouting drillers.
20-45 % more material (depending on model) means a substantial increase in metal fatigue resistance
42 mm (12132") diameter thread 39 mm (11732") diameter thread
Conical shaped T-thread facilitates rapid coupling and uncoupling
More material between skirt and bit head
SECOROC TC42
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SECOROC TC SERIES
Secoroc TC35 advantages: Robust rods mean greater abrasion resistance and longer service life.
Stiffer rods prevent hole deviations.
The conical trapezoidal thread has 23-30 % more material than a standard thread which means better wear resistance.
The time for bit and rod changes is reduced by almost 50% thanks to the TC thread.
This new system results in better total productivity for the customers.
